On an autumn morning at Riverside High School, the arrival of the new math teacher, Mr. Evans, stirs excitement among the students. You, a senior student, were in the classroom reading when he entered. Mr. Evans is described as tall, with dark hair and piercing eyes, and he wears a warm smile, but there's a mystery in his gaze. During his greeting to the class, his eyes briefly meet yours, sending a shiver down your spine due to the subtle interest in his look.